84 



reduced to a single very small joint attached near the inner corner of the meral 

 joint; branchial apparatus well developed, gill-elements arranged in a semicircle, 

 digitiform in female, leaf-like in male. Second pair of maxillipeds of rather 

 anomalous appearance, basal joint very massive and confluent with the ischial 

 one, carpal and propodal joints connected at nearly a right angle, the former 

 triangularly expanded inside, the latter oblong oval in form, and terminating in 

 a setiform lappet, terminal joint very small and armed with strong diverging 

 spines. Third pair of maxillipeds of more normal structure, with the meral joint 

 more or less dilated. First pair of legs unusually small, and resembling in structure 

 the 3rd pair of maxillipeds; 2nd pair much bent, with the terminal joint styli- 

 form. The 3 posterior pairs of legs in female successively diminishing in length 

 and rather narrow, basal joint of 3rd and 4th pairs in male greatly dilated. 

 Uropoda with the rami shorter than the stem, the inner one the larger and 

 spinulous inside, stem in male clothed with slender seta? inside. 



Remarks. This genus was established by the present author in the year 

 1864, to include the anomalous form described by Prof. Lilljeborg as Cuma 

 rubicunda, and at the same time 2 new Norwegian species were added. Subse- 

 quently the number of species has been considerably augmented, amounting at 

 present to no less than 14. One of these species, however, the Greenland form, 

 C. carinata of Hansen, is, I think, scarcely referable to the present genus, and 

 may indeed even belong to a different family, the Nannastacidoe. As, however, 

 neither the legs nor the oral parts of this form have been examined, it is impos- 

 sible at present to settle this question. To the fauna of Norway belong 8 different 

 species, to be described below. 



1. Campylaspis rubicunda (Lilljeborg). 



(PI. LVI, LVII). 

 Cuma nibicunda, Lilljeborg. 0fvers. af Vet. Akad. Forhandl. 1855, p. 121. 



Specific Characters. Female. Body very short and robust, with the an- 

 terior division greatly tumefied. Carapace of quite an extraordinary size, occupying 

 half the length of the body, and boldly arched behind, surface perfectly smooth 

 throughout, frontal part but slightly exserted, pseudorostral projection short, 

 though acute at the tip, subrostral corners obsolete. The first 2 pedigerous seg- 

 ments elevated dorsally to well-marked procurved lamella?. Caudal segments 

 distinctly depressed and comparatively short. Eye distinct, semicircular and 

 somewhat prominent. Anterior maxillse with the palp very slender and carrying 

 a single, apical seta ; posterior maxillse with only 3 apical bristles and one lateral. 



